Google Wins Major Court Battle Over Ad Tech Business

A US federal judge has decided that Google will not be forced to sell its online advertising exchange, known as AdX. This decision is a significant victory for the technology giant, which has been fighting a long legal battle against the US Department of Justice (DOJ) over its dominance in the digital advertising market.

In 2025, Judge Leonie Brinkema ruled that Google held an illegal monopoly in the markets for publisher ad servers and ad exchanges. An antitrust case — a legal action taken by the government to stop companies from having too much power and hurting competition — was brought against the company in 2023. The DOJ and a group of states argued that Google used its power to make it difficult for competitors to succeed. They claimed that Google “rigged” ad auctions to give itself an unfair advantage. However, while the judge agreed that Google acted in an anticompetitive way, she decided that forcing the company to sell its ad exchange was not the right solution.

According to The Guardian, the judge accepted most of the behavioral changes proposed by the parties instead of a forced sale. These changes are designed to fix the market without breaking up the company. While the exact details of the final order are currently sealed for 14 days to allow for final reviews, they are expected to include rules that stop Google from using certain unfair auction tactics. The Verge reports that these rules might also allow other companies to access the same real-time information that Google uses, helping to create a more level playing field.

Google expressed satisfaction with the court’s decision. Lee-Anne Mulholland, a Vice President at Google, stated that the company is pleased the court rejected the proposal to break apart tools that help small businesses reach new customers. On the other side, the DOJ noted that it is pleased the court ordered "substantial relief" and is currently evaluating its next steps. Associate AG Stanley Woodward Jr. mentioned that the court’s order reflects a balance between wanting immediate results and the long process of legal action.

This ruling is the third time in a row that a US judge has rejected an attempt by government officials to break up a major technology company. Previously, a judge in Washington refused to make Meta sell Instagram and WhatsApp, saying the government failed to prove Meta held a monopoly. In another case, a different judge decided that Google would not have to sell its Chrome browser, even after ruling that the company held an illegal monopoly in online search. These repeated outcomes have led to questions about whether the current court system is able to effectively limit the power of the largest technology firms in the US economy.

Experts note that the ad exchange is only a small part of Google’s total revenue. However, the government had argued that selling it was the best way to restore competition. Ars Technica reports that while the government did not get the breakup it wanted, the case is not entirely over. The DOJ still asked for fines and other changes to how Google does business, and it is likely that the court will grant many of these requests. The final details will become public in two weeks once the judge finishes reviewing the documents.

Looking ahead, the legal pressure on big tech companies remains high. While the district court phase for this case is ending, Google still has the option to appeal the judge’s original decision that it is an illegal monopoly. Meanwhile, other major antitrust cases against companies like Amazon and Apple are expected to move forward in the coming years. As the industry changes with the rise of new technologies like artificial intelligence, the government continues to look for ways to ensure fair competition for all businesses.